Tight pulley for looms



E. D ROY AND E. W. HUDSON.

TIG HT PULLEYTOR iooms'.

I I APPLICATION FILED NOV-30,192}- l 7 1,421, 1 Patented June 27, 1922.

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Gu ana UN-irsn STATES PATENT OFFIQE.

EDWARD D. ROY AND ELET W. HUDSON, OF GREENVILLE, SOUTH CAROLINA.

TIGHT PULLEY FOR LOOMS.

T0 aZZw/lom itmay concern:

Be it known that we, EDWARD D. ROY and ELET W. HUnsoN, residents of Greenville, county of Greenville, and State of South Carolina, have invented certain new and useful Improvements in Tight Pulleys for Looms, of which the following is a full and clear specification.

In looms, the tight, power pulley is, by reason of the special mechanism of the loom, subjected to a very rapid jarring action, as is well known. This jarring action in time loosens the pulley by wearing away the key and the key-way, and this looseness of the pulley causes the shaft to wear away at a point opposite the key, this wearing action extending around the shaft about onehalf of its circumference. The pulley also wears away within the hub. This wearing of the pulley-hub and the shaft in time necessitates the substitution of a new shaft and a new pulley. It is the object of the present invention to provide a method of repairing pulley-fastening means that will permit of the utilization of the old pulley and the old shaft, as more fully hereinafter set forth.

In the drawing- Fig. 1 is a vertical sectional view of thepulley made in accordance with our invention;

Fig. 2 is a vertical transverse section on the line 22 of Fig. 1;

Figs. 3 and 1 are detailviews hereinafter described.

Referring to the drawing annexed by reference-characters, 5 designates the powershaft which has been worn away at 6, at a point opposite the key-way 7. The pulleyhub is designated 8. WVe bore out the pulley-hub on a taper and screw-thread its interior. Adapted to screw into this tapered bore is a bushing consisting of three segments 9, 10 and 11, the direction of the thread being such that the pull of the belt on the pulley will tend to screw the pulley onto the bushing and thus tighten the bushing against the shaft. whereby the greater the pull on the belt the greater will be the clamping action of the segments on the shaft.

We prevent the segments from rotating on the shaft by means of a radial pin 12 which Specification of Letters Patent.

Patented June 27, 1922.

Application filed. November 30, 1921. Serial No. 518,888.

desirably is driven into the shaft at a point in the key-way 7. This pin engages a series of notches '13 formed in the adjacent edges of the segments 9 and 10, these notches extending the entire length of the segments and serving to permit the segments to be ad- 'justed to the desired point along the shaft with their threads in circumferential alinement. The segment 11 is fitted against the shaft at the worn part 6, fitting down in the recess formed by the wearing-away of the shaft. This necessitates that this segment 11 shall be in advance of the other segments to the extent of the depth of the worn place, so that the clamping action of the segments against the shaft will be completely equalized, thus ensuring a rigid anchoring of the pulley on the shaft even though the shaft be considerably worn.

The nature and scope of the invention having been thus indicated and its preferred embodiment having been specifically described, what is claimed as new is:

1. The method herein described of repairing tight-pulley fastenings consisting in-anchoring upon the worn part of the shaft a plurality of externally-threaded segments, one of which is fitted down into the worn part of the shaft, and securing a pulley-hub over said segments to thus clamp them uniformly upon the shaft.

2.,A pulley fastening embodying a hub internally tapered and threaded, a plurality of segments externally threaded, the adjacent edges of two of said segments being notched, and an anchoring-pin set in the shaft and adapted to engage said notches.

3. A pulley having a tapered internallythreaded hub, a bushing consisting of three segments externally threaded for screwing into said hub, and means for anchoring said bushing to the shaft, one of said segments being in advance of the remaining segments and fitting into a depression in the shaft.

In testimony whereof we hereunto aflix our signatures this 28th day of Nov, 1921.

EDWARD D. ROY. ELET W. HUDSON.

Witnesses:

H. C. MCKNIGHT, J OHN R. BATES. 

